key = $key; if( $iv == 0 ) { $this->iv = $key; } else { $this->iv = $iv; //mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM ); } } function encrypt($str) { //加密，返回大写十六进制字符串 $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC ); $str = $this->pkcs5Pad ( $str, $size ); return strtoupper( bin2hex( mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv ) ) ); } function decrypt($str) { //解密 $strBin = $this->hex2bin( strtolower( $str ) ); $str = mcrypt_cbc( MCRYPT_DES, $this->key, $strBin, MCRYPT_DECRYPT, $this->iv ); $str = $this->pkcs5Unpad( $str ); return $str; } function hex2bin($hexData) { $binData = ""; for($i = 0; $i < strlen ( $hexData ); $i += 2) { $binData .= chr ( hexdec ( substr ( $hexData, $i, 2 ) ) ); } return $binData; } function pkcs5Pad($text, $blocksize) { $pad = $blocksize - (strlen ( $text ) % $blocksize); return $text . str_repeat ( chr ( $pad ), $pad ); } function pkcs5Unpad($text) { $pad = ord ( $text {strlen ( $text ) - 1} ); if ($pad > strlen ( $text )) return false; if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad) return false; return substr ( $text, 0, - 1 * $pad ); }}$my_encrypt = new DES('qwertyuiop');echo $my_encrypt->encrypt('1234567');

网上找到各种的都不对，上面贴的这个好像因PHP版本的问题测试也有各种错误，不知怎么改。

回复讨论(解决方案)

试试这个： http://www.cnblogs.com/wangchuang/archive/2012/04/23/2466002.html

楼上说的这个的测试结果：

Notice: Uninitialized string offset: 6 in C:\web\project1\web\dec.php on line 148

Notice: Uninitialized string offset: 7 in C:\web\project1\web\dec.php on line 148

Notice: Uninitialized string offset: 6 in C:\web\project1\web\dec.php on line 148

Notice: Uninitialized string offset: 7 in C:\web\project1\web\dec.php on line 148

MDN2IAFG6iMABKVbI2l+KA==

hello levenPHP Notice: Uninitialized string offset: 6 in C:\web\project1\web\dec.php on line 148 PHP Notice: Uninitialized string offset: 7 in C:\web\project1\web\dec.php on line 148 PHP Notice: Uninitialized string offset: 6 in C:\web\project1\web\dec.php on line 148 PHP Notice: Uninitialized string offset: 7 in C:\web\project1\web\dec.php on line 148

function encrypt($str, $key) { $block = mcrypt_get_block_size('des', 'ecb'); $pad = $block - (strlen($str) % $block); $str .= str_repeat(chr($pad), $pad); return mcrypt_encrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);}function decrypt($str, $key) { $str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB); $block = mcrypt_get_block_size('des', 'ecb'); $pad = ord($str[($len = strlen($str)) - 1]); return substr($str, 0, strlen($str) - $pad); }php5.6.3 通过

据说是与 java 兼容的

你的有 Deprecated: Function mcrypt_cbc() is deprecated

显然是不能用的

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